could enthrall
Regular verb: enthrall - enthralled- enthralled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could enthrall
you could enthrall
he could enthrall
we could enthrall
you could enthrall
they could enthrall 	I could be enthralling
you could be enthralling
he could be enthralling
we could be enthralling
you could be enthralling
they could be enthralling	I could have enthralled
you could have enthralled
he could have enthralled
we could have enthralled
you could have enthralled
they could have enthralled	I could have been enthralling
you could have been enthralling
he could have been enthralling
we could have been enthralling
you could have been enthralling
they could have been enthralling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't enthrall
you couldn't enthrall
he couldn't enthrall
we couldn't enthrall
you couldn't enthrall
they couldn't enthrall 	I couldn't be enthralling
you couldn't be enthralling
he couldn't be enthralling
we couldn't be enthralling
you couldn't be enthralling
they couldn't be enthralling	I couldn't have enthralled
you couldn't have enthralled
he couldn't have enthralled
we couldn't have enthralled
you couldn't have enthralled
they couldn't have enthralled	I couldn't have been enthralling
you couldn't have been enthralling
he couldn't have been enthralling
we couldn't have been enthralling
you couldn't have been enthralling
they couldn't have been enthralling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I enthrall?
could you enthrall?
could he enthrall?
could we enthrall?
could you enthrall?
could they enthrall? 	could I be enthralling?
could you be enthralling?
could he be enthralling?
could we be enthralling?
could you be enthralling?
could they be enthralling? 	could I have enthralled?
could you have enthralled?
could he have enthralled?
could we have enthralled?
could you have enthralled?
could they have enthralled? 	could I have been enthralling?
could you have been enthralling?
could he have been enthralling?
could we have been enthralling?
could you have been enthralling?
could they have been enthralling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I enthrall?
couldn't you enthrall?
couldn't he enthrall?
couldn't we enthrall?
couldn't you enthrall?
couldn't they enthrall? 	couldn't I be enthralling?
couldn't you be enthralling?
couldn't he be enthralling?
couldn't we be enthralling?
couldn't you be enthralling?
couldn't they be enthralling? 	couldn't I have enthralled?
couldn't you have enthralled?
couldn't he have enthralled?
couldn't we have enthralled?
couldn't you have enthralled?
couldn't they have enthralled? 	couldn't I have been enthralling?
couldn't you have been enthralling?
couldn't he have been enthralling?
couldn't we have been enthralling?
couldn't you have been enthralling?
couldn't they have been enthralling?